1 <?php
  2     class testHelper {
  3         var $instance = null;
  4
  5         private function __construct() {
  6         }
  7
  8         function getInstance() {
  9             if (!$this->instance) {
 10                 $this->instance = new testHelper();
 11             }
 12
 13             return $this->instance;
 14         }
 15
 16         function nabCounters() {
 17             return RobDB::getInstance()->queryCol('SELECT CID FROM Counter');
 18         }
 19     }
 20 ?>